Question

我有一个包含不同子文档类型数组的模式。下面的架构只是一个例子：

VehicleSchema：

let BikeSchema = new Schema({
  title       : { type: String, required: [true, 'title is required'] },
  type        : { type: String, required: true, default: "bike" },
  tyres       : { type: Number, required: true, min: 2}
});

let TruckSchema = new Schema({
  title       : { type: String, required: [true, 'title is required'] },
  type        : { type: String, required: true, default: "truck" },
  tyres       : { type: Number, required: true, min: 4},
  doors       : { type: Number, required: true}
});

let VehicleSchema = new Schema({
  name: {type:String, required: [true, 'name is required']},
  vehiclesSelected: [BikeSchema, TruckSchema],
});

Below is the json that I need to validate:
vehicle = {
  "name": 'abc',
  "vehiclesSelected": [
    {"type": "truck", doors: 2},
    {"type": "bike", tyres: 3},
    {"type": "bike"}
  ]
}

现在我需要根据JSON中传递的'type'验证“vehiclesSelected”数组。有人能告诉我如何验证基于特定字段的子文档数组（在本例中为'type'）？

非常感谢任何帮助。

Answer 1

您可以使用Mongoose的discriminator（）函数。

在您的情况下，您可以做的是：

let BikeSchema = new Schema({
  title       : { type: String, required: [true, 'title is required'] },
  tyres       : { type: Number, required: true, min: 2}
});

let TruckSchema = new Schema({
  title       : { type: String, required: [true, 'title is required'] },
  tyres       : { type: Number, required: true, min: 4},
  doors       : { type: Number, required: true}
});

let typeVehicleSchema = new Schema({},
discriminatorKey: 'type', _id: false})

let VehicleSchema = new Schema({
  name: {type:String, required: [true, 'name is required']},
  vehiclesSelected: [typeVehicleSChema],
});

VehicleSchema.path('vehiclesSelected').discriminator('truck', new Schema(TruckSchema))
VehicleSchema.path('vehiclesSelected').discriminator('bike', new Schema(BikeSchema))

这样，根据车辆类型，您的架构将使用适当的子类型进行验证，两者都继承父模式（在本例中为typeVehicleSchema），基于传入的“类型”。

Mongoose - 验证不同子文档类型的数组

1 个答案: